It's definitely not plug and play. Depending on what's inside your P80, you would need a minimum of 2, probably 3, additional regulators, and additional smoothing capacitors, to be fitted inside your P80.
Tom is based in Poland. If you're OK to collect from Poland or pay for it to ship in a crate (probably around £100 - £150), then it may be worth having a chat with Tom about price, but you would still need to do the fitting / alterations yourself.
Otherwise, DIY something of your own is the way to go. There are plenty of people here with the knowledge required. It's not a job that we would want to take on - between new builds, current upgrades and prototyping new integrated and Cubes, we just don't have the time.